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ICSE Class 10 Population and Pollution — practice questions — page 3

Explore 100 free Population and Pollution questions in ICSE Class 10 Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Population and Pollution questions and exercises with answers

Showing questions 61–90 of 100.

Births exceed deaths in a population, with no migration. What happens to its size?Read the answer and worked solution →Which expression gives natural increase over a period?Read the answer and worked solution →Which expression gives net migration?Read the answer and worked solution →A district has 900 births, 700 deaths, 40 immigrants and 60 emigrants. What is its population change?Read the answer and worked solution →A population ends a period larger than it began. What sign is its growth rate?Read the answer and worked solution →A population becomes smaller over a measured period. Its growth rate is:Read the answer and worked solution →If births and deaths are equal and migration is zero, what is natural increase?Read the answer and worked solution →Which birth/death pattern raises natural increase?Read the answer and worked solution →Why can lower mortality increase population?Read the answer and worked solution →Which development helped reduce mortality and support population growth?Read the answer and worked solution →Improved sanitation can contribute to population growth mainly by lowering what?Read the answer and worked solution →Which is a population-explosion problem?Read the answer and worked solution →Population pressure can cause what to resources?Read the answer and worked solution →Rapid growth may reduce which measure per person?Read the answer and worked solution →Why may prices rise when population grows faster than supplies?Read the answer and worked solution →Which environmental issue can population growth worsen?Read the answer and worked solution →Unequal distribution of wealth is listed as a possible consequence of what?Read the answer and worked solution →Which concept sets the sustainable size ceiling for a population?Read the answer and worked solution →Which resources limit carrying capacity?Read the answer and worked solution →At carrying capacity, what does a simple population model predict about long-term size?Read the answer and worked solution →Which operation blocks sperm transport by occluding the vas deferens?Read the answer and worked solution →Which structure is cut or sealed in a vasectomy?Read the answer and worked solution →Which process does vasectomy block?Read the answer and worked solution →After vasectomy, what continues to produce testosterone?Read the answer and worked solution →Which statement about sperm after vasectomy is accurate?Read the answer and worked solution →Which description best identifies tubectomy?Read the answer and worked solution →Which structures are blocked in tubal ligation?Read the answer and worked solution →How does tubal ligation prevent fertilization?Read the answer and worked solution →Which two surgical controls are in the syllabus?Read the answer and worked solution →For 1,000 people, 15 births and 5 deaths mean what natural increase rate?Read the answer and worked solution →

Worked practice questions

Births exceed deaths in a population, with no migration. What happens to its size?

  1. It declines over the period
  2. It grows over the period
  3. It stays the same size
  4. It immediately becomes zero
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Correct answer: B. It grows over the period

When births exceed deaths, natural increase makes the population grow.

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Which expression gives natural increase over a period?

  1. Deaths minus births
  2. Immigration minus births
  3. Births minus deaths
  4. Emigration plus deaths
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Correct answer: C. Births minus deaths

Natural increase is the number of births minus the number of deaths.

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Which expression gives net migration?

  1. Immigration minus emigration
  2. Births minus deaths
  3. Deaths plus immigration
  4. Emigration minus births
Show answer and solution

Correct answer: A. Immigration minus emigration

Net migration is immigration minus emigration.

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